stellina_rosa [http://community.jboss.org/people/stellina_rosa] created the discussion "Drools accumulate function" To view the discussion, visit: http://community.jboss.org/message/611010#611010 -------------------------------------------------------------- Hi! I'm trying to use the accumulate function in my rules, but I haven't the expected result. this is my rule: rule "Total days"             when                          $mo: MyObject()        $total : Number() from accumulate(Item(item=="days", $val:value) from $mo.items, sum( $val ) )     then                           System.out.println($total); end Suppose that tha values of MyObject(id, arrayList<Item> items) are: MyObject(id=1, items({price,10},{days,2}); MyObject(id=2, items({price,15},{days,5}); MyObject(id=3, items({price,20},{days,7}); the result should be 2+5+7 = 14 but instead it print me 3 value: 2 5 7 .... where I wrong? I want the sum of the days...! please help me..! thank you! -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/611010#611010] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]